* Williams, B., The Point of View of the Universe. Sidgwick and the Ambitions of Ethics, in: The Cambridge Review, 1982.

> SIDNEY, ALGERNON

* Forster, Th., Original Letters of John Locke, Algernon Sidney, and Lord Shaftesbury with an Analytical Sketch of the Writings and Opinions of Locke and Other Metaphysicians, 1847, Bristol (reprint) 1990.